Jan ( N = 220 )

Feb ( N = 306 )

Mar ( N = 342 )

Apr ( N = 330 )

May ( N = 335 )

Jun ( N = 313 )

Jul ( N = 341 )

Aug ( N = 330 )

Sep ( N = 326 )

Oct ( N = 340 )

Nov ( N = 302 )

Dec ( N = 328 )